US Patent 7246633 Shock absorber

A shock switch main has a main member, a resting device and a return device. The main member has a chamber therein, a first passageway communicated to the chamber, a resting portion at a bottom of the chamber, an aperture on the resting portion, a vertical chamber communicated with the aperture and a second passageway communicated with the vertical chamber. The closing device is rested on the resting portion adapted to drop into the aperture. A return assembly is provided in the vertical chamber, which is moved to move the closing device back to the resting portion from the aperture.